Time Sieve
Biotransference
Xenograft
Rotlung Reanimator

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
You control at least five other creatures. "Cleric" chosen with Xenograft.

   Steps

How does this combo work?
1
Activate Time Sieve by tapping it and sacrificing five creatures.
2
Rotlung Reanimator triggers five times, creating five 2/2 Zombie creature tokens.
3
Resolve the Time Sieve ability, causing you to take an extra turn after this one.
4
Repeat each turn.

   Results

What do I get from this combo?
Lock
Infinite turns